package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.beans.beancontext.BeanContext;
import java.time.LocalDateTime;
import java.util.List;

/**
 * @author jingchun
 * @create 2024-04-28 19:16
 */
@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {

	@Autowired
	private ShoppingCartMapper shoppingCartMapper;
	@Autowired
	private DishMapper dishMapper;
	@Autowired
	private SetmealMapper setmealMapper;

	/**
	 * 添加购物车
	 * @param shoppingCartDTO
	 */
	public void add(ShoppingCartDTO shoppingCartDTO) {
	// 	查询购物车中是否存在数据
		ShoppingCart shoppingCart = new ShoppingCart();
		BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
		shoppingCart.setUserId(BaseContext.getCurrentId());
		List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

		// 	如果存在，数量+1
		if(list != null && list.size() > 0) {
			ShoppingCart cart = list.get(0);
			cart.setNumber(cart.getNumber() + 1);
			shoppingCartMapper.updateNumberByid(cart);
		}else {
			// 	如果不存在，新增一条购物车数据
			Long dishId = shoppingCartDTO.getDishId();
			if(dishId != null){
			// 	添加到购物车的是菜品
				Dish dish = dishMapper.getById(dishId);
				shoppingCart.setName(dish.getName());
				shoppingCart.setAmount(dish.getPrice());
				shoppingCart.setImage(dish.getImage());
			}else {
				// 添加到购物车的是套餐
				Long setmealId = shoppingCartDTO.getSetmealId();
				Setmeal setmeal = setmealMapper.getById(setmealId);
				shoppingCart.setName(setmeal.getName());
				shoppingCart.setAmount(setmeal.getPrice());
				shoppingCart.setImage(setmeal.getImage());
			}
			shoppingCart.setNumber(1);
			shoppingCart.setCreateTime(LocalDateTime.now());
			shoppingCartMapper.insert(shoppingCart);

		}

	}

	public List<ShoppingCart> showShoppingCart() {
		Long userId = BaseContext.getCurrentId();
		ShoppingCart shoppingCart = ShoppingCart.builder().userId(userId).build();
		List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
		return list;
	}

	/**
	 * 清空购物车
	 */
	@Override
	public void cleanShoppingCart() {
		Long userId = BaseContext.getCurrentId();
		shoppingCartMapper.deleteByUserId(userId);

	}
}
